package com.sjgtw.cloud.common.security.service;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import javax.servlet.http.HttpServletRequest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import com.sjgtw.cloud.common.core.constant.CacheConstants;
import com.sjgtw.cloud.common.core.constant.Constants;
import com.sjgtw.cloud.common.core.utils.IdUtils;
import com.sjgtw.cloud.common.core.utils.SecurityUtils;
import com.sjgtw.cloud.common.core.utils.ServletUtils;
import com.sjgtw.cloud.common.core.utils.StringUtils;
import com.sjgtw.cloud.common.core.utils.ip.IpUtils;
import com.sjgtw.cloud.common.redis.service.RedisService;
import com.sjgtw.cloud.system.api.model.LoginUser;

/**
 * <p>Title: 验证token处理类</p>
 * <p>Description: </p>
 * @author Admin
 * @date 2020-7-8
 */
@Component
public class TokenService
{
	private final static long EXPIRE_TIME = Constants.TOKEN_EXPIRE * 60;

	private final static String ACCESS_TOKEN = CacheConstants.LOGIN_TOKEN_KEY;

	protected static final long MILLIS_SECOND = 1000;
	
	@Autowired
	private RedisService redisService;

	/**
	 * 创建令牌
	 */
	public Map<String, Object> createToken(LoginUser loginUser) {
		// 生成token
		String token = IdUtils.fastUUID();
		loginUser.setToken(token);
		loginUser.setUserid(loginUser.getSysUser().getUserId());
		loginUser.setUsername(loginUser.getSysUser().getUserName());
		loginUser.setIpaddr(IpUtils.getIpAddr(ServletUtils.getRequest()));
		refreshToken(loginUser);

		// 保存或更新用户token
		Map<String, Object> map = new HashMap<String, Object>();
		map.put("access_token", token);
		map.put("expires_in", EXPIRE_TIME);
		redisService.setCacheObject(ACCESS_TOKEN + token, loginUser, EXPIRE_TIME, TimeUnit.SECONDS);
		return map;
	}

	/**
	 * 获取用户身份信息
	 *
	 * @return 用户信息
	 */
	public LoginUser getLoginUser() {
		return getLoginUser(ServletUtils.getRequest());
	}

	/**
	 * 获取用户身份信息
	 *
	 * @return 用户信息
	 */
	public LoginUser getLoginUser(HttpServletRequest request) {
		// 获取请求携带的令牌
		String token = SecurityUtils.getToken(request);
		if (StringUtils.isNotEmpty(token)) {
			String userKey = getTokenKey(token);
			LoginUser user = redisService.getCacheObject(userKey);
			return user;
		}
		return null;
	}

	/**
	 * 设置用户身份信息
	 */
	public void setLoginUser(LoginUser loginUser) {
		if (StringUtils.isNotNull(loginUser) && StringUtils.isNotEmpty(loginUser.getToken())) {
			refreshToken(loginUser);
		}
	}

	public void delLoginUser(String token) {
		if (StringUtils.isNotEmpty(token)) {
			String userKey = getTokenKey(token);
			redisService.deleteObject(userKey);
		}
	}

	/**
	 * 刷新令牌有效期
	 *
	 * @param loginUser 登录信息
	 */
	public void refreshToken(LoginUser loginUser) {
		loginUser.setLoginTime(System.currentTimeMillis());
		loginUser.setExpireTime(loginUser.getLoginTime() + EXPIRE_TIME * MILLIS_SECOND);
		// 根据uuid将loginUser缓存
		String userKey = getTokenKey(loginUser.getToken());
		redisService.setCacheObject(userKey, loginUser, EXPIRE_TIME, TimeUnit.SECONDS);
	}

	private String getTokenKey(String token) {
		return ACCESS_TOKEN + token;
	}
}